Charge Indicator Lamp; Oil Pressure Gauge; Low Engine Oil Level Indicator; Engine Oil C Onsum Ption - Mercedes-Benz 300SDL-TURBO 126 D 1986 Owner's Manual

Charge In d ica to r Lamp
Should the charge indicator lamp fail
to come on prior to starting when the
key is in steering lock position 2 or
should it fail to go out after starting or
during operation, this indicates a fault
w hich m ust be repaired at an author­
ized MERCEDES-BENZ dealer as
soon as possible.
When the charge indicator lamp
glows while the engine is running, the
V -belt may have broken (which also
makes the water pump inoperative).
This may cause overheating and dam­
age to the engine. In this case the
V -belt must be replaced immediately.

Oil Pressure Gauge

The oil pressure at idle speed may
drop to 0.3 bar (4.4 psi) if the engine
is at operating tem perature. This will
not jeopardize its operational reliabil­
ity.
Pressure must, however, rise
immediately upon acceleration.
Low Engine Oil Level
In d ic a to r Lamp
The indicator lamp com es on with the
key in steering lock position 2 and
should go out when the engine is run­
ning.
If the indicator lamp com es on with
the engine running and at operating
tem perature, the oil level has dropped
to the minimum mark on the dipstick.
When this occurs, the indicator lamp
will firs t com e on interm ittently and
then stay on if the oil level drops fu r­
ther. Engine oil should be added at
the next opportunity (we recom mend
that you add 1 liter [1.1 US qt]).
In addition to the indicator lamp, the
engine oil level should be periodically
checked with the dipstick, fo r exam­
ple after a fuel fill-up, or before a long
trip (see page 66).

Engine Oil C onsum ption

Engine oil consum ption can only be
determ ined after a certain mileage
has been covered. During the break-
in period, higher oil consum ption may
be noticed and is normal.
C oo la n t Tem perature Gauge
If the antifreeze mixture is effective to
- 30° C ( - 22° F) the boiling point of
the coolant in the pressurized cooling
system of your vehicle is approx.
125° C (257° F) (see also " Fuels,
Coolants, Lubricants, e tc ." ).
During severe operating conditions
and stop-and-go city traffic, the coo­
lant tem perature may rise close to the
red marking.
Low Engine C oo lan t Level
In d ic a to r Lamp
The indicator lamp comes on with the
key in steering lock position 2, and
should go out when the engine is run­
ning.
If it com es on with the engine running,
the coolant has dropped below the
required level. You should then have
the engine cooling system checked
fo r signs of leakage and have it refilled
as soon as possible (see page 65).